How BharatPe Earns? #LLAShorts 131

In which of the following radioactive isotopes I -131 is not used?

A man earns Rs. 25 per hour. How much does he earn in x hours?

Shikha earns Rs 3000 for working in 8 days. How much will she earn if she works for 15 days?

How many numbers are there from 11 to 131 which are divisible by both 5 and 7?

If the cost of a notebook is Rs 8 3/4, how many notebooks can be purchased for Rs 131 1/4?

A woman worker earns Rs.18000 in 15 months.How much does she earn in 7 months? In how many months will she earn Rs.30000?

Bachhu Manjhi earns Rs 24000 in 8 months. At this rate, in how many months does he earn Rs 42000?