Question

Коля задумал число ,вычел из него 21,результат разделил на 8 ,а потом умножил на 5 и получил 15 .какое число задумал коля?

Answer 1

15/5*8+21=45
число задумал коля

Answer 2

Число  задумал 45
45-21=24
24:8=3
3*5=15

Answer 3

Problem Analysis

Kolya thought of a number, subtracted 21 from it, divided the result by 8, and then multiplied it by 5 to get 15. We need to find the number that Kolya initially thought of.

Solution

Let's break down the problem step by step to find the solution.

Step 1: Kolya thought of a number. Step 2: He subtracted 21 from it. Step 3: He divided the result by 8. Step 4: He multiplied the quotient by 5. Step 5: The final result is 15.

To find the number Kolya initially thought of, we need to reverse the steps.

Step 5: The final result is 15. Step 4: He multiplied the quotient by 5. So, let's divide 15 by 5 to get the quotient. - 15 / 5 = 3

Step 3: He divided the result by 8. So, let's multiply 3 by 8 to get the result before division. - 3 * 8 = 24

Step 2: He subtracted 21 from it. So, let's add 21 to 24 to get the result before subtraction. - 24 + 21 = 45

Step 1: Kolya thought of a number. So, the number Kolya initially thought of is 45.

Answer

The number that Kolya initially thought of is 45.