Others Maths Puzzle

For the word 'RAINBOW', how many words are there in which vowels are never together ? How many words are there in which A is always before I and I is always before O ? Explain the answers please.

Read Solution (Total 0)

Others Other Question

A 200m long 2m high and 40 cm wide wall is built by 20 men, 30 women and 50 children working 6 hours a day in 20 days. How long a wall 1.5 high 60 cm wide can be built by 20men 15 women and 40 children working 9 hours a day in 15 days(given men, women and children are equally efficient) ? X is picked up from school by his father daily to go home is a car. One day school leaves before 1 hour. so X starts walking towards his house at 3km/h. As a result they reach home 15 mins before time. Find the speed of his father's car.