(i) To Find : Value of

Formulae :

•

•

Let,

By using above formula, we can write,

Cancelling (5!) from numerator and denominator we get,

∴x = 504

Conclusion : Hence, value of the expression is 504.

(ii) To Find : Value of

Formula :

Let,

By using the above formula we can write,

Cancelling (29!) from numerator and denominator,

∴x = 32 × 31 × 30

∴x = 29760

Conclusion : Hence, the value of the expression is 29760.

(iii) To Find : Value of

Formula :

Let,

By using the above formula we can write,

Taking (9!) common from numerator,

Cancelling (9!) from numerator and denominator,

∴x = (12 × 11 × 10) - 10

∴x = 1310

Conclusion : Hence, the value of the expression is 1310.