1) Find the false statement a) 1 is a factor of every number b) Every number is a factor of itself. c) factors of a number is greater than or equal to that number d) The number of factors of a given number are finite 2) Find the true statement a) Every number is not a multiple of itself b) The number of multiples of a given number is infinite c) 1 is a multiple of every number d) The multiples of a given number are less than the number 3) Factors of  36 are a) 1,2,4,36 b) 1,3,4,6,12,36 c) 1,2,3,4,6,9,12,18,36 d) 1,2,3,4,6,9,12,36 4) Which one is the perfect number a) 5 b) 8 c) 28 d) 7 5) Which of the following pair of numbers are co prime numbers a) 52 and 81 b) 124 and 246 c) 36 and 48 d) 42 and 54 6) What is the twin prime number of 73, if it has a twin prime number? a) 75 b) 71 c) no twin prime d) 72 7) Example of prime triplet is a) (2,3,5) b) (11,13,15) c) (3,5,7) d) (23, 29, 31) 8) The product of two even numbers is always a) odd b) even c) both odd and even d) can't predict 9) The number which is divisible by 2 is a) 142 b) 225 c) 329 d) 423 10) The number which is divisible by 3 is a) 343 b) 241 c) 231 d) 61 11) Which number is divisible by 4 a) 736 b) 970 c) 455 d) 623 12) Which number is divisible by 5 a) 750 b) 843 c) 476 d) 932 13) Which number is divisible by 6 a) 672 b) 535 c) 423 d) 737 14) Which is a multiple of 8 a) 5034 b) 4728 c) 7113 d) 6253 15) Which is a multiple of 9 a) 3457 b) 8154 c) 8153 d) 5734 16) A number is divisible by 10 a) if the number in the unit place is 0 or 5 b) if the sum of the digits is divisible by 2 and 5 c) if the digit in the unit place is 0 d) if the sum of the digits is zero 17) Which is the multiple of 11 a) 13172 b) 34561 c) 71412 d) 81354 18) 6 is a factor of 24 and 48 the 6 is factor of ..................... a) 16 b) 72 c) 35 d) 47 19) Which of the following number is a multiple of 15 a) 115 b) 135 c) 70 d) 85 20) 46a7b2 is a 6- digit number in which both a and b are missing digits. This number is divisible by 9. The least possible and maximum value of a+b is  a) 8 and 18 b) 9 and 17 c) 9 and 18 d) 8 and 17 21) The factors of 188 are a) 1,2,4,47,94, 188 b) 1,2,3,94,188 c) 2,3,3,47,94,188 d) 1,2,4,188

Mathematics unit test- more about numbers

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