question_answer1) Which among the following statements is incorrect?
A) Multiplicative inverse of 0 is not defined. done clear
B) Every rational has a reciprocal. done clear
C) The product of a non- zero rational number and its reciprocal is 1. done clear
D) The idea of mean helps us to find rational numbers between two given rational numbers. done clear
E) None of these done clear
View Solution play_arrowA) \[22.25\text{ }m\] done clear
B) \[21.25\text{ }m\] done clear
C) \[24.45\text{ }m\] done clear
D) \[26.45\text{ }m\] done clear
E) None of these done clear
View Solution play_arrowquestion_answer3) Identify the rational number which does not belong with the other three.
A) \[\frac{-4}{5}\,\] done clear
B) \[\,\frac{-3}{7}\] done clear
C) \[\frac{-2}{9}\,\] done clear
D) \[\frac{9}{-11}\] done clear
E) None of these done clear
View Solution play_arrowA) lf \[m>n\]and \[p<n\]then \[p>m\] done clear
B) if \[m>n\] and \[p~\ne 0\]then \[m+p>n+p\] done clear
C) If \[m>n\] and \[n>p\]then \[m>p\] done clear
D) If \[m>n\] and \[p<0\]then \[mp>np\] done clear
E) None of these done clear
View Solution play_arrowquestion_answer5) Every composite number has _______
A) three factors done clear
B) atleast two factors done clear
C) atleast three factors done clear
D) more than three factors done clear
E) None of these done clear
View Solution play_arrowquestion_answer6) Which among the following number is not divisible by 182?
A) 309400 done clear
B) 993720 done clear
C) 159562 done clear
D) 527800 done clear
E) None of these done clear
View Solution play_arrowquestion_answer7) A perfect number is the number for which sum of all its factors is equal to_____
A) one less than twice the number done clear
B) one more than twice the number done clear
C) twice the number done clear
D) one less than twice the number done clear
E) None of these done clear
View Solution play_arrowA) \[\frac{-121}{207}\] done clear
B) \[\frac{-80}{207}\] done clear
C) \[\frac{-160}{207}\] done clear
D) \[\frac{-306}{414}\] done clear
E) None of these done clear
View Solution play_arrowA) a prime number done clear
B) a super number done clear
C) a perfect number done clear
D) an odd number done clear
E) None of these done clear
View Solution play_arrowquestion_answer10) Which among the following is not a perfect number?
A) 6 done clear
B) 28 done clear
C) 496 done clear
D) 120 done clear
E) None of these done clear
View Solution play_arrowquestion_answer11) Find the unit's digit in the product of the first 100 odd natural numbers.
A) 0 done clear
B) 1 done clear
C) 3 done clear
D) 5 done clear
E) None of these done clear
View Solution play_arrowquestion_answer12) Which among the following pair of numbers is not twin primes?
A) 13 and 11 done clear
B) 5 and 7 done clear
C) 29 and 23 done clear
D) 3 and 5 done clear
E) None of these done clear
View Solution play_arrowquestion_answer13) Which among the following pair of numbers are co-primes?
A) 204 and 189 done clear
B) 10353 and 1073 done clear
C) 3553 and 1755 done clear
D) 2233 and 3689 done clear
E) None of these done clear
View Solution play_arrowA) 40 done clear
B) 42 done clear
C) 41 done clear
D) 39 done clear
E) None of these done clear
View Solution play_arrowA) 116 done clear
B) 112 done clear
C) 118 done clear
D) 158 done clear
E) None of these done clear
View Solution play_arrowA) 6 done clear
B) 9 done clear
C) 12 done clear
D) 15 done clear
E) None of these done clear
View Solution play_arrowquestion_answer17) Find the LCM of the least 4-digit number and the greatest 4-digit even number.
A) 9998000 done clear
B) 4567800 done clear
C) 4999000 done clear
D) 260000 done clear
E) None of these done clear
View Solution play_arrowquestion_answer18) The greatest five digit number exactly divisible by 7 and 23 both is____
A) 99995 done clear
B) 99981 done clear
C) 99974 done clear
D) 99988 done clear
E) None of these done clear
View Solution play_arrowA) 14 done clear
B) 13 done clear
C) 12 done clear
D) 18 done clear
E) None of these done clear
View Solution play_arrowquestion_answer20) Find the unit's digit in the product of the first 50 even natural numbers.
A) 2 done clear
B) 4 done clear
C) 6 done clear
D) 0 done clear
E) None of these done clear
View Solution play_arrowquestion_answer21) How many prime numbers are of the form 3m+2, where\[1\le m\le 20\]?
A) 6 done clear
B) 7 done clear
C) 8 done clear
D) 9 done clear
E) None of these done clear
View Solution play_arrowA) 0 done clear
B) 1 done clear
C) 2 done clear
D) 3 done clear
E) None of these done clear
View Solution play_arrowA) 5 done clear
B) 6 done clear
C) 8 done clear
D) 11 done clear
E) None of these done clear
View Solution play_arrowA) 6 done clear
B) 12 done clear
C) 8 done clear
D) 14 done clear
E) None of these done clear
View Solution play_arrowA) \[\frac{80}{9}\] done clear
B) \[\frac{80}{11}\] done clear
C) \[\frac{70}{9}\] done clear
D) \[\frac{88}{10}\] done clear
E) None of these done clear
View Solution play_arrowA) 32 done clear
B) 16 done clear
C) 64 done clear
D) 28 done clear
E) None of these done clear
View Solution play_arrowquestion_answer27) Find the multiplicative inverse of\[(a+2)+\frac{4}{(a-2)}\].
A) \[\frac{a}{\left( a+2 \right)}\] done clear
B) \[\frac{{{a}^{2}}}{a-2}\] done clear
C) \[\frac{\left( a-2 \right)}{{{a}^{2}}}\] done clear
D) \[\frac{a}{\left( a-2 \right)}\] done clear
E) None of these done clear
View Solution play_arrowquestion_answer28) If * 35624 is divisible by 11, then the value of * is ____
A) 3 done clear
B) 4 done clear
C) 6 done clear
D) 8 done clear
E) None of these done clear
View Solution play_arrowquestion_answer29) The product of three consecutive natural numbers will be divisible by ___
A) 3 done clear
B) 9 done clear
C) 15 done clear
D) 6 done clear
E) None of these done clear
View Solution play_arrowA) 4 done clear
B) 1 done clear
C) 2 done clear
D) 3 done clear
E) None of these done clear
View Solution play_arrowquestion_answer31) The unit digit of \[{{\left( 8127 \right)}^{173}}\] is _____
A) 1 done clear
B) 9 done clear
C) 3 done clear
D) 7 done clear
E) None of these done clear
View Solution play_arrowA) 1 done clear
B) 1466 done clear
C) 1078 done clear
D) 2 done clear
E) None of these done clear
View Solution play_arrowquestion_answer33) The difference of squares of two consecutive numbers is 31. The numbers are _____
A) 16 and 18 done clear
B) 16 and 17 done clear
C) 15 and 16 done clear
D) 17 and 18 done clear
E) None of these done clear
View Solution play_arrowquestion_answer34) The unit digit of \[({{7}^{95}}-{{3}^{58}})\] is____
A) 7 done clear
B) 1 done clear
C) 4 done clear
D) 9 done clear
E) None of these done clear
View Solution play_arrowquestion_answer35) Choose the greatest number among the following:
A) \[{{\left[ {{(3+3)}^{2}} \right]}^{2}}\] done clear
B) \[{{\left[ 3\times 3\times 3 \right]}^{2}}\] done clear
C) \[{{\left[ 3\div 3+3 \right]}^{3}}\] done clear
D) \[{{3}^{3}}+{{3}^{3}}\] done clear
E) \[{{\left[ {{3}^{2}}+{{3}^{2}} \right]}^{3}}\] done clear
View Solution play_arrowA) greater than a done clear
B) less than a done clear
C) equal to a done clear
D) more than 10 done clear
E) None of these done clear
View Solution play_arrowquestion_answer37) The least square number which is divisible by 8, 12 and 16 is _____
A) 256 done clear
B) 324 done clear
C) 144 done clear
D) 288 done clear
E) None of these done clear
View Solution play_arrowA) 1121 done clear
B) 1331 done clear
C) 1031 done clear
D) 1271 done clear
E) None of these done clear
View Solution play_arrowA) 16 done clear
B) 54 done clear
C) 2 done clear
D) 128 done clear
E) None of these done clear
View Solution play_arrowA) \[276.4\] done clear
B) \[2764\] done clear
C) \[27.64\] done clear
D) \[2.764\] done clear
E) None of these done clear
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