`cxxcxxc....5 `times

A block of steel of size 5 cm xx 5cm xx 5cm is weighed in water. If the relative density of steel is 7. its apparent weight is:

Find the remainder when x=5^(5^(5^(5...))) (24 times 5) is divided by 24.

Verify and state the property used in each of the following. 5 times(8 + 5)=(5 times8) + (5 times 5)

Find the sum 2xx5+5xx9+8xx13+11xx17+.. n terms.

Evaluate: (0.8 xx 0.8 xx 0.8 + 0.5 xx 0.5 xx 0.5)/(0.8 xx 0.8 - 0.8 xx 0.5 + 0.5 xx 0.5)

Express each of the following in exponential form: (i) (-5)xx(-5)xx(-5) (ii) (-5)/7xx(-5)/7xx(-5)/7xx(-5)/7 (iii) 4/3xx4/3xx4/3xx4/3xx4/3

Starting from (-5) times 4 , find (-5) times (-3) .

Evaluate: (-3) times (-4) times (-5) times (-6) times 7

Evaluate: (5 times (-4) times (-6))/(-3)

(1/4xx2/3)xx5/6=...xx(2/3xx5/6)