How many zeroes are there at the end of the following product?
1 x 5 x 10 x 15 x 20 x 25 x 30 x 35 x 40 x 45 x 50 x 55 x 60
(a) 10 (b) 12 (c) 14 (d) 15
Answer: (a)
Let XYZ be a three-digit number, where (x + y + Z) is not a multiple of 3. Then (XYZ + YZX + ZXY) is not divisible by
(a) 3 (b) 9 (c) 37 (d) (X + Y + Z)
Answer: (b)
Let p, q, r and s be natural numbers such that p - 2016 = q + 2017 = r – 2018 = s + 2019 which one of the following is the largest natural number?
(a) p (b) q (c) r (d) s
Answer: (c)
How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 4 and 5 without repetition of digits?
(a) Zero (b) One (c) Nine (d) Ten
Answer: (a)
In the sum ®+1®+ 5®+®®..® 1®® for which digit does the symbol ® stand?
(a) 2 (b) 3 (c) 4 (d) 5
Answer: (b)
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