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## Ans 1: (Master Answer)

The correct answer is A.

Count the number of total balls = 21

Count the number of crossed balls = 6

So, the subtraction sentence will be **21 - 6.**

Now make the subtraction sentences for all options:

(A) 2 tens 1 one - 6 ones = 21 - 6

(B) 2 tens 2 ones - 6 ones = 22 - 6

(C) 2 tens - 6 ones = 20 - 6

(D) 2 tens 3 tens - 6 ones = 23 - 6

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## Ans 11: (Master Answer)

The correct answer is C

Flower changes into fruits and fruit bears seeds. Seeds give rise to new plants when sown into soil.

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## Ans 7: (Master Answer)

The correct answer is D

In transverse wave, vibration of a wave is perpendicular to its direction of propagation of wave.

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## Ans 2: (Master Answer)

The correct answer is A.

Sugar syrup is neutral and hence the colour of blue litmus and red litmus remains unchanged. Tamarind juice is acidic, so blue litmus turns red but red litmus does not change its colour. Lime water and soap solution are basic in nature which turn red litmus blue whereas blue litmus remains unchanged.