# Number System Questions and answers

Topics

51). Find the sum of first 37 odd numbers.
 A). 1369 B). 1295 C). 1388 D). 1875
52). Find the sum of first 84 even numbers.
 A). 7140 B). 7540 C). 6720 D). 8832
53). Sum of first 15 multiples of 8 is
 A). 960 B). 660 C). 1200 D). 1060
54). The poduct of four consecutive natural numbers plus one is
 A). a non-square B). always sum of two square numbers C). a square D). None of the above
55). Find the unit digit in the product of (268 x 539 x 826 x 102).
 A). 5 B). 3 C). 4 D). 2

56). Find the unit digit in the product of (4326 x 5321).
 A). 6 B). 8 C). 1 D). 3
57). Find the last two-digits of 15 x 37 x 63 x 51 x 97 x 17
 A). 35 B). 45 C). 55 D). 85
58). How many rational numbers are there between 1 and 1000?
 A). 998 B). 999 C). 1000 D). Infinite
59). The sum of 5 consecutive even numbers A,B,C,D and E is 130. What is the product of A and E ?
 A). 720 B). 616 C). 660 D). 672
60). The sum of the five consecutive numbers is equal to 170. What is the product of largest and the smallest numbers?
 A). 1512 B). 1102 C). 1152 D). 1210
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Total Pages : 36