Page 14 - Bangladesh_classwiz_BOOK2018_rev_Neat

Drcv`‡K we‡kølY‡K hvPvB Kivi Rb¨, GB †gŠwjK Drcv`‡Ki ¸wYZK¸‡jv‡K ¸Y Kiv n‡jv-

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fvM ev ¸Y Kiv n‡j Kxfv‡e c~Y msL¨vi NvZ wewkó msL¨v¸‡jv‡K GKwÎZ Kiv hvq Zv GB wb‡`©kbv e¨envi
K‡i cvIqv hvq|GwU wb‡P †`Lv‡bv n‡jv-

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Dc‡ii cÖ_g I Z…Zxq w¯Œb jÿ¨ Ki‡j †`Lv hv‡e †h, hw`I cÖ_g w¯Œ‡b 7 × 7 †K 7 AvKv‡i cÖ`k©b K‡i‡Q,
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wKš‘ K¨vjKz‡jUi 12 × 12 †K 12 wn‡m‡e cÖ`k©b bv K‡i eis Zvi ‡gŠwjK Drcv`K 2 I 3 Gi gva¨‡g
msL¨vwU‡K cÖ`k©b K‡i‡Q| KviY 12 wb‡R †gŠwjK msL¨v bq, wKš‘ 7 GKwU †gŠwjK msL¨v|
`yBwUi msL¨vi j.mv.¸ (jwNô mvaviY ¸YbxqK) Ges M. mv. ¸ (Mwiô mvaviY ¸wYZK) †ei Kivi Rb¨ FACT
myweav e¨envi Kiv hvq| †hgb, 12 Ges 15 Gi j.mv. ¸ Ges M.mv.¸ †ei Ki‡Z n‡e| | Gici 12 Ges 15
Gi †gŠwjK Drcv`¸‡jv FACT e¨envi K‡i wb‡Pi g‡Zv †ei Kiv n‡jv-

Dc‡ii w¯Œb †_‡K †`Lv hv‡”Q 12 Gi †gŠwjK Drcv`K 2, 2, 3 Ges 15 Gi †gŠwjK Drcv`K 3, 5| myZivs 12
I 15 Gi j.mv.¸ n‡e 2 × 2 × 3 × 5 = 60|

12 = 2 × 2 × 3
15 = 3 × 5

2 × 2 × 3 × 5 = 60

Avevi †`Lv hv‡”Q †h, 3 msL¨vwU 12 Ges 15 Df‡qi mvaviY Drcv`K| myZivs M.mv.¸ n‡e 3|

Av‡iv fv‡jvfv‡e †evSvi Rb¨ 4 I 15 Gi j.mv.¸ I M.mv.¸ †ei Kiv n‡jv-

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