Question
15 pens and 30 pencils cost Rs. 180. If the cost of a
pencil is Rs. 4, then find the cost of 10 pens.Solution
ATQ, Let the cost of a pen be Rs. n. So, 30 × 4 + 15n = 180 Or, 120 + 15n = 180 Or, 15n = 60 Or, n = 4 Therefore, cost of 10 pens = 10 × 4 = Rs. 40
If 'P' stands for '+', 'Q' stands for '×', 'R' stands for '-', and 'S' stands for '÷', then what is the value of the following expression?
64 S...
- Which two signs should be interchanged to correct the given equation?
5 + 3 × 8 – 12 ÷ 4 = 3 Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
48 * 14 * 7 * 11 * 4 = 89
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
425 * 250 * 200 * ...
Select the correct combination of mathematical signs that can sequentially replace '*' sign and balance the equation given below.
12* 6 * 3 * 54 * 9 * 12
If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
78 - 3 X 18 ÷ 18 +...
Select the correct combination of mathematical signs that can sequentially replace the sign * and make the equation correct.
3 * 12 * 4 * 5 * 4...
Select the correct combination of mathematical signs that can sequentially replace '*' sign and balance the equation given below.
90 * 5 * 15 * 2...
Select the correct combination of mathematical signs that can sequentially replace the * signs and make the equation correct.
25 * 55 * 30 * 66 * 48 = 48
If 22 – 16 means 352, 450 + 50 means 9, 9 ÷ 3 means 12, 11 x 8 means 3, then ' 280 – 5 x 240 ÷ 450 + 9 x 26' = ?
