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Question Number 112572 by Aina Samuel Temidayo last updated on 08/Sep/20

Commented by mr W last updated on 08/Sep/20

$s e e Q 112533$
	Answered by mr W last updated on 09/Sep/20

	$1 & 11$ $. . .} 10 p a i r s$ $10 & 20$ $21 & 31$ $. . .} 10 p a i r s$ $30 & 40$ $. . . . . .$ $81 & 91$ $. . .} 10 p a i r s$ $90 & 100$ $i . e . w e c a n s e l e c t a t m o s t 50 n u m b e r s$ $w i t h o u t t w o n u m b e r s a m o n g t h e m$ $w h o s e d i f f e r e n c e i s 10 .$ $\Rightarrow t h e a n s w e r i s 51 .$
	Commented by Aina Samuel Temidayo last updated on 09/Sep/20

	$Thanks .$
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