Others Maths Puzzle

How many natural numbers b/w 1 and 900 are not multiples of any of the numbers 2,3,5 ?

1.240
2.250
3.270
4.300

Read Solution (Total 2)

Others Other Question

A motorboat went downstream for 28km and immediately returned. It took the boat twice as long to make the return trip. If the speed of the river flow were twice as high, the trip downstream and back would take 672 mins. Find the speed of the the boat in still water and the speed of the river flow.

a. 9km/h, 3km/h
b. 9km/h, 6km/h
c. 8km/h, 2km/h
d. 12km/h, 3km/h.

x! ends with k zeros; (x+3)! ends with (k+3) zeros . 0