Question

Written below are numbers $1$ to $99$ . Circle every fifth number. Begin with $5$ .

$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$11$	$12$	$13$	$14$	$15$	$16$	$17$	$18$	$19$	$20$
$21$	$22$	$23$	$24$	$25$	$26$	$27$	$28$	$29$	$30$
$31$	$32$	$33$	$34$	$35$	$36$	$37$	$38$	$39$	$40$
$41$	$42$	$43$	$44$	$45$	$46$	$47$	$48$	$49$	$50$
$51$	$52$	$53$	$54$	$55$	$56$	$57$	$58$	$59$	$60$
$61$	$62$	$63$	$64$	$65$	$66$	$67$	$68$	$69$	$70$
$71$	$72$	$73$	$74$	$75$	$76$	$77$	$78$	$79$	$80$
$81$	$82$	$83$	$84$	$85$	$86$	$87$	$88$	$89$	$90$
$91$	$92$	$93$	$94$	$95$	$96$	$97$	$98$	$99$	$\times$

Accepted Answer

Given,

$1$ $2$ $1$ $2$ $3$ $6$ $7$ $6$ $7$ $8$

$11$ $12$ $11$ $12$ $13$ $14$ $15$ $16$ $17$ $18$

$21$ $22$ $21$ $22$ $23$ $24$ $25$ $26$ $27$ $28$

$31$ $32$ $31$ $32$ $33$ $34$ $35$ $36$ $37$ $38$

$41$ $42$ $41$ $42$ $43$ $44$ $45$ $46$ $47$ $48$

$51$ $52$ $51$ $52$ $53$ $54$ $55$ $56$ $57$ $58$

$61$ $62$ $61$ $62$ $63$ $64$ $65$ $66$ $67$ $68$

$71$ $72$ $71$ $72$ $73$ $74$ $75$ $76$ $77$ $78$

$81$ $82$ $81$ $82$ $83$ $84$ $85$ $86$ $87$ $88$

$91$ $92$ $91$ $92$ $93$ $94$ $95$ $96$ $97$ $98$

We, need to circle every fifth number given in the grid.

Let us circle every fifth numbers means we need to circle the number by using the method of skip counting by $5' s$ .

That is we need to add $4$ to get the next number to be circled.

Now, $1 + 4 = 5; 6 + 4 = 10$

By following the above process we can write other numbers as,

$5, 10, 15, 20, 25, 30, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95$

$1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$

$11$ $12$ $13$ $14$ $15$ $16$ $17$ $18$ $19$ $20$

$21$ $22$ $23$ $24$ $25$ $26$ $27$ $28$ $29$ $30$

$31$ $32$ $33$ $34$ $35$ $36$ $37$ $38$ $39$ $40$

$41$ $42$ $43$ $44$ $45$ $46$ $47$ $48$ $49$ $50$

$51$ $52$ $53$ $54$ $55$ $56$ $57$ $58$ $59$ $60$

$61$ $62$ $63$ $64$ $65$ $66$ $67$ $68$ $69$ $70$

$71$ $72$ $73$ $74$ $75$ $76$ $77$ $78$ $79$ $80$

$81$ $82$ $83$ $84$ $85$ $86$ $87$ $88$ $89$ $90$

$91$ $92$ $93$ $94$ $95$ $96$ $97$ $98$ $99$ $\times$

Hence, every fifth numbers are circled as shown above.

Important Questions on Skip Counting

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