Mind blowing facts in hindi

The work done in blowing a bubble of volume V is W , then what is the work done in blowing a soap bubble of volume 2V ?

An elocution competition was held in Telugu and Hindi. Out of 80 students 45 students took part in Telugu, 35 in Hindi, 15 both in Telugu and Hindi. Then find the number of students (i) who took part in Telugu but not Hindi (ii) who took part in Hindi but not Telugu (iii) who took part in either Telugu or Hindi (iv) who took part in neither

In a class, 30% students study English, 15% study Hindi and 10% study both English and Hindi. One student is selected at random. Find the probability that (i) He studies English if it known that he Hindi (ii) He studies Hindi if it is known that he studies English

10 हिंदी जासूसी और मजेदार पहेलियाँ | Hindi Paheliyan | Hindi Paheliyan | Mind Your Logic

Paheliyan and Detective Riddles To Test Your Brain| Hindi Paheliyan | Mind Your Logic