Page 24 - Arithmetic

7. 6 bells of a playschool start tolling together and tell time at an interval of 3, 6, 9, 12, 15 and 18 seconds. In 45 minutes, how many times will they toll together?
a) 10 b) 12 c) 13 d) 15
e) 16
8. Three friends Harry, Ron, and Jerry, run a race on a circular track and start from the same point at the same time. Harry completes one round in 100 seconds, Ron in 175 seconds, and Jerry in 150 seconds. When will the three friends meet again at the starting point?
a)35 minutes b) 32 minutes 12 seconds c) 14 minutes 28 seconds d) 38 minutes
e) They will never meet
9. Which of the following fractions is less than 11 but greater than 1? 15 6
a) 17 20
c) 41 50
e) 13 25
b) 24 25
d) 19 25
10. Find the least number which leaves a remainder of 4 on dividing by 16, 18, 20, and 25 in each case, but which leaves no remainder when it’s divided by 7.
a) 3604 b) 7204
c) 18004 d) 14404
e) 21604
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Arithmetic Concept