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There were 35 teachers in a school. If the number of teachers increases by 8, the daily expenditure on milk for tea increases by Rs. 45 per day while the average expenditure decreased by Rs. 1. Find the new expenditure on milk for tea.

Himanshu disbursed his monthly salary 20% on clothes, 15% on food and 40% of the remaining on home rent. He left with Rs. 3900 after all expenses then find how much he earned in one month?

Purav borrowed Rs. 6000 from Harshit at 10% compound interest per annum for 3 years and added some extra money and lent to Kishan at 20% compound interest per annum for 24 months. If Purav got Rs. 1974 more interest than interest got by Harshit. Then find the extra money added by Purav.

Aman can do 40% work in 22 days, Raj can do 41.66% work in 25 days, and Amit can do the whole work in 44 days. The ratio of efficiency of Aman and Jatin is 3:5. If Amit works for only 6 days, Aman and Raj work for 10 days then find how many days will Jatin take to complete the remaining work.

Two types of oil, A and B have been mixed in the ratio of 3:2 and total mixture is 90 litres. When one third of mixture was consumed, some more quantity of oil A was mixed with the mixture and the ratio was made 2:1. The quantity of oil A mixed later on was:

What should come in place of the question mark '?' in the following number series?

?, 2560, 2400, 2320, 2280, 2260

What should come in place of the question mark '?' in the following number series?

30, 15, ?, 30, 120, 960

What should come in place of the question mark '?' in the following number series?

141, 148, 134, 162, ?, 218

What should come in place of the question mark '?' in the following number series?

25, 44, 66, 91, 119, ?

What should come in place of question mark (?) in the following number series?

25, 34, 45, 58, 73, ?