Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?