If 49 @ 13 # 26= 98 and 57 # 13@ 247=3 then find the value of 46@23#3=?

If + means - , - means ×, × means ÷, and ÷ means +, then what will be the value of following expression?
15 – 2 ÷ 90 × 9 + 10

Which two symbols should be interchanged to make the following equation correct.
6 ÷ 5 + 12 × 4 – 7 =26

By interchanging which two signs the equation will be correct?
9 + 6 × 2 ÷ 4 – 6 = 15

A tree increases annually by 1/8th of its height. By how much will it increase after 2 years, if it stands today 64cm high?

Which two signs and two numbers should be interchanged in the following equation to make it correct?
 150 × 15 + 14 – 9 ÷ 2 =6

In the following question, correct the equation by interchanging the two signs.
6 ÷ 17 x 51 + 6 – 12 = – 4

If two symbols, '÷' and '×' and the two numbers '2' and '8' are interchanged, what will be the value of the following equation?
4 ×8÷2=?