Test Series Test 02 (Number Series) 1. The least number which when divided by 12, 18 and 30 leaves remainder 5 in each case is: a) 175 b) 185 c) 365 d) 545 None 2. The greatest 4-digit number exactly divisible by 15, 20 and 25 is: a) 9905 b) 9900 c) 9950 d) 9875 None 3. The HCF of 24×32×524×32×5 and 23×34×5223×34×52 is: a) 180 b) 360 c) 120 d) 240 None 4. The LCM of 36, 48 and 72 is: a) 96 b) 140 c) 144 d) 288 None 5. Which of the following is irrational? a) 4949 b) 0.272727...0.272727... c) \sqrt{7}) d) 11131311 None 6. Value of (0.333...)×9(0.333...)×9 a) 1 b) 2 c) 3 d) 9 None 7. Number of prime factors of 756 is: a) 3 b) 4 c) 5 d) 6 None 8. The decimal expansion of 740407 is: a) Non-terminating recurring b) Terminating c) Irrational d) Whole number None 9. Which is a perfect cube? a) 864 b) 500 c) 512 d) 486 None 10. The smallest number to be added to 5600 to make it a perfect square: a) 20 b) 25 c) 76 d) 81 None 11. If aa and bb are co-prime, then HCF of aa and bb is: a) 0 b) 1 c) a d) b None 12. The product of two numbers is 432 and their HCF is 6. If LCM is 72, verify relation: a) wrong b) HCF × LCM = Product c) HCF + LCM = Product d) none None 13. The least prime number: a) 1 b) 2 c) 3 d) 5 None 14. Number of divisors of 360: a) 20 b) 24 c) 18 d) 30 None 15. The units digit of 71037103 is: a) 1 b) 3 c) 7 d) 9 None 16. The binary equivalent of 45104510 is: a) 100111 b) 101101 c) 101011 d) 111001 None 17. Convert 11010121101012 to decimal: a) 51 b) 53 c) 55 d) 57 None 18. Value of (1011)2+(1101)2(1011)2 +(1101)2 a) 10100 b) 11000 c) 11110 d) 10010 None 19. The smallest number divisible by both 16 and 24 is: a) 32 b) 64 c) 48 d) 96 None 20. Which of the following is not a rational number? a) 5775 b) 2.25 c) \(pi) d) -8 None 21. If 2x=1282x=128 then xx equals: a) 6 b) 7 c) 8 d) 9 None 22. The remainder when 31003100 is divided by 7: a) 1 b) 4 c) 2 d) 6 None 23. Number of zeros at end of 25!25!: a) 4 b) 6 c) 5 d) 7 None 24. If a number leaves remainder 3 when divided by 5 and remainder 4 when divided by 6, least such number is: a) 9 b) 18 c) 28 d) 34 None 25. The value of 5+265+26 a) 2+32 +3 b) \sqrt2+\sqrt3) c) 3−23 −2 d) 5 None 1 out of 25 Time's up
