question_answer1) What are the numbers which have more than two factors called?
A) Even numbers
B) Prime numbers
C) Composite numbers
D) Odd numbers
View Answer play_arrowquestion_answer2) What are the numbers which have only two factors (1 and the number itself) called?
A) Composite numbers
B) Even numbers
C) Prime numbers
D) Odd numbers
View Answer play_arrowquestion_answer3) Which is the number that is neither prime nor composite?
A) 0
B) 1
C) 2
D) 5
View Answer play_arrowquestion_answer4) Which of the following is the L.C.M. of 36 and 72?
A) 36
B) 72
C) 108
D) 2
View Answer play_arrowquestion_answer5) What is the L.C.M. of 17 and 5?
A) 105
B) 95
C) 85
D) 5
View Answer play_arrowquestion_answer6) What is the H.C.F. of 17 and 5?
A) 1
B) 5
C) 17
D) 85
View Answer play_arrowquestion_answer7) Give an example for twin primes.
A) 5, 11
B) 3, 5
C) 11, 17
D) 3, 7
View Answer play_arrowquestion_answer8) What is the H.C.F. of two co-prime numbers?
A) 1
B) 0
C) 2
D) 4
View Answer play_arrowquestion_answer9) Which of the following is an example of an even number?
A) 10351
B) 20989
C) 69007
D) 973572
View Answer play_arrowquestion_answer10) What is the H.C.F. of 120, 144 and 216 ?
A) 38
B) 24
C) 120
D) 144
View Answer play_arrowquestion_answer11) What do you get when you multiply two factors?
A) Sum
B) Product
C) Difference
D) Quotient
View Answer play_arrowquestion_answer12) Every number is a _____ and a _____ of itself.
A) factor, multiple
B) prime, composite
C) even, odd
D) prime, twin prime
View Answer play_arrowquestion_answer13) What are the numbers which are multiples of 2 called?
A) Odd numbers
B) Even numbers
C) Prime numbers
D) Composite numbers
View Answer play_arrowquestion_answer14) What is the H.C.F. of the two numbers equal to?
A) Product of the numbers \[\div \] their L.C.M.
B) Product of the numbers \[\times \] their L.C.M.
C) Product of the numbers.
D) Quotient of the numbers.
View Answer play_arrowquestion_answer15) Which of these numbers is a factor of every number ?
A) 0
B) 1
C) 2
D) 4
View Answer play_arrowquestion_answer16) How many prime numbers are there between 1 and 50?
A) 18
B) 12
C) 15
D) 20
View Answer play_arrowquestion_answer17) A is the 5th prime number. B is the 7th prime number. What is B - A?
A) 6
B) 8
C) 12
D) 2
View Answer play_arrowquestion_answer18) What is the number of prime numbers between 50 and 60?
A) 1
B) 2
C) 3
D) 4
View Answer play_arrowquestion_answer19) Which of the following is the prime factorisation of 140?
A) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 7}\]
B) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 5}\]
C) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{ 7}\]
D) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{ 7 }\!\!\times\!\!\text{ 3}\]
View Answer play_arrowquestion_answer20) The successor of every even number is
A) even
B) prime
C) odd
D) composite.
View Answer play_arrowquestion_answer21) What is the sum of the first five multiples of 6?
A) 90
B) 60
C) 30
D) 120
View Answer play_arrowA) 1394
B) 1404
C) 1664
D) 1406
View Answer play_arrowA) 1012
B) 1008
C) 1015
D) 1022
View Answer play_arrowquestion_answer24) What is the greatest 4-digit number exactly divisible by 12, 15, 20 and 35?
A) 9999
B) 9660
C) 9832
D) 9860
View Answer play_arrowA) 504
B) 516
C) 508
D) 512
View Answer play_arrowA) 9
B) 10
C) 15
D) 12
View Answer play_arrowquestion_answer27) A number is always divisible by 90 if
A) it is divisible by both 2 and 45.
B) it is divisible by both 5 and 18.
C) it is divisible by both 9 and 10.
D) All the above.
View Answer play_arrowA) I only
B) II only
C) Both I and II
D) Neither I nor II
View Answer play_arrowquestion_answer29) Which of the following numbers is divisible by 11?
A) 3,116,365
B) 901,351
C) 8,790,322
D) 311,136
View Answer play_arrowquestion_answer30) Which of the following numbers is a perfect number?
A) 6
B) 28
C) 6 and 28
D) 34
View Answer play_arrowA) 8 = 1 + 7
B) 8 = 3 + 5
C) 4 = 1 + 3
D) 4 = 2 + 2
View Answer play_arrowA) 9
B) 6
C) 2
D) 1
View Answer play_arrowquestion_answer33) The L.C.M. of 64 and 48 is 192.What is the H.C.F. of these numbers?
A) 16
B) 24
C) 8
D) 12
View Answer play_arrowquestion_answer34) What is the prime factorisation of 143?
A) \[\text{2 }\!\!\times\!\!\text{ 11 }\!\!\times\!\!\text{ 13}\]
B) \[\text{11 }\!\!\times\!\!\text{ 13}\]
C) \[\text{2 }\!\!\times\!\!\text{ 3 }\!\!\times\!\!\text{ 7}\]
D) \[\text{1 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 3 }\!\!\times\!\!\text{ 7}\]
View Answer play_arrowA) 13
B) 26
C) 104
D) 143
View Answer play_arrowA) \[\text{2}\times \text{2}\times \text{2}\times \text{3}\]
B) \[\text{8 }\!\!\times\!\!\text{ 3}\]
C) \[\text{3 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 2}\]
D) \[\text{2 }\!\!\times\!\!\text{ 3 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 2}\]
View Answer play_arrowquestion_answer37) The table given lists the number of factors for some numbers.
Number | Number of factors |
21 | 4 |
23 | 2 |
25 | 3 |
27 | 4 |
29 | 2 |
A) 0
B) 2
C) 3
D) 4
View Answer play_arrowquestion_answer38) Find a number which is a multiple of all the numbers from 1 to 10?
A) 5040
B) 1260
C) 720
D) 1440
View Answer play_arrowquestion_answer39) Observe the following sums. What is the result of the sum 1+3+5+7+9+ ..... +15?
A) 121
B) 81
C) 100
D) 64
View Answer play_arrowquestion_answer40) How many factors does 48 have?
A) 2
B) 4
C) 8
D) 10
View Answer play_arrowquestion_answer41) Which of the following is a factor of the number shown on the spike abacus?
A) 10
B) 7
C) 5
D) 8
View Answer play_arrowA) 2
B) 4
C) 6
D) 8
View Answer play_arrowquestion_answer43) Which of the following is a prime number?
A) 117
B) 171
C) 179
D) 143
View Answer play_arrowquestion_answer44) Which of the following is a composite number?
A) 23
B) 29
C) 32
D) 13
View Answer play_arrowquestion_answer45) Which of the following products is an odd number?
A) \[\text{even }\!\!\times\!\!\text{ odd }\!\!\times\!\!\text{ even}\]
B) \[\text{odd }\!\!\times\!\!\text{ odd }\!\!\times\!\!\text{ even}\]
C) \[\text{even }\!\!\times\!\!\text{ even }\!\!\times\!\!\text{ even}\]
D) \[\text{odd }\!\!\times\!\!\text{ odd }\!\!\times\!\!\text{ odd}\]
View Answer play_arrowA) 34
B) 37
C) 39
D) 33
View Answer play_arrowquestion_answer47) What is the L.C.M. of 12, 15, 20 and 27?
A) 270
B) 360
C) 480
D) 540
View Answer play_arrowquestion_answer48) If a and bare co-primes, then what is their L.C.M.?
A) 1
B) \[\frac{\text{a}}{\text{b}}\]
C) \[\text{ab}\]
D) \[\text{a + b}\]
View Answer play_arrowA) 1 hour
B) \[\text{1}\frac{1}{2}\]hours
C) \[2\frac{1}{2}\] hours
D) 3 hours
View Answer play_arrowA) 999
B) The greatest 3 digit number.
C) Both [a] and [b]
D) The smallest 3-digit number.
View Answer play_arrowquestion_answer51) The lowest common multiple of 8,16 and p is 48. What is the possible value of p?
A) 64
B) 24
C) 2
D) 32
View Answer play_arrowA) p
B) r
C) q
D) s
View Answer play_arrowquestion_answer53) The sum of all the prime factors of m is 9. Find the number m.
A) 15
B) 28
C) 20
D) 63
View Answer play_arrowA) 900
B) 2500
C) 1200
D) 3600
View Answer play_arrowA) 6
B) 2
C) 8
D) 12
View Answer play_arrowA) 6
B) 9
C) 12
D) 24
View Answer play_arrowquestion_answer57) Identify the H.C.F. of the first even number and the fifth composite number.
A) 10
B) 2
C) 20
D) 5
View Answer play_arrowA) 1200
B) 120
C) 1440
D) 144
View Answer play_arrowYou need to login to perform this action.
You will be redirected in
3 sec