0.15 / (0.5 / 15) = ?

In a village, (5/8)th of the population are adults,half of the adults are male,(4/5)th of adult females are illiterate. if 400 females are illiterate, then the population of the village is ?

From a rope 30 m long, a person cuts off as many pieces as possible, each 3 1/4 m long. What fraction of the whole will be left ?

1/8th part of a pencil is black, half of the remaining is white. If the remaining part is blue and length of this blue part is 3 1/2cm, then find the length of the pencil ?

What decimal of an hour is a second

9.99 x 9.9 x 9 ÷ 9.9 ÷ 0.3 = ?

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