Which two signs should be interchanged to make the given equation correct? 

306 ÷ 17 + 4 - 50 × 8 = 30

What symbol completes the pattern: 5 △ 2 = 10, 6 △ 3 = 18, 7 △ 4 =?

If ‘@’ means ‘×’, ‘$’ means ‘+’, '*' means '÷' and ‘&’ means ‘–’, then evaluate:
36 @ 25 * 5 & 36 $ 0= ?

What will come in the place of '?' in the following equation, if '+' and 'x' are interchanged and '-' and '÷' are interchanged?

15 ÷ 36 - 18 + 0 x 25 = ?

If "♥" means half the number, what is the value of 20 ♥?

If "@" means greater than, "#" means less than, and "&" means equal to, then which of the following is TRUE?

(A) 8 # 9

(B) 5 @ 7

(C) 6 & 9

If ♥ = 8, ♣ = 4, and ★ = 6, what is (♥ + ★) ÷ ♣?

If 3 ⊕ 2 = 5 and 4 ⊕ 3 = 7, what is 5 ⊕ 4?

If 3 ◊ 2 = 13 and 4 ◊ 3 = 25, find 5 ◊ 2.

At present, the ratio between the ages of Arun and Deepak is 4:3. After 6 years, Arun's age will be 26 years. What is the age of Deepak at present?

A man is engaged for planting trees for 10 hours. He plants 10 trees in an hour. He takes rest for 30 minutes after every hour. How many trees does he plant in 10 hours?

Select the number that will come in the place of the question mark (?), if ‘+’ and ‘-’ are interchanged and ‘x’ and ‘÷’ are interchanged. 

11 × 8 ÷ 5 + 30 − 50 = ?

Which two signs should be interchanged to make the following equation correct? 

139 + 40 ÷ 5 - 168 × 3 = 283