Three-fifths of the people at a concert are children. If there are a total of \( 60 \) people at the concert, what is the total number of children at the concert? What is the total number of adults at the concert? 

10. \( (899)^{2} \) નું મૂલ્ય શોદો.

- A teacher has three grade 9 classes with 21,35 and 28 students, respectively The teacher wants to order some mathematical equipment that can be used by groups in each class. What is the largest number of students in a group in each class sa. that each group has the same number of students?

41. एक हॉल के फर्श जिसकी विमाएँ 12 मी. \( \times 10 \) मी. है, को पूरी तरह से ढकने के लिए विमाएँ 10 सेमी \( \times 8 \) सेमी की कितनी आयताकार टाइलें चाहिए ? \( \begin{array}{ll}\text { (A) } 12,000 & \text { (B) } 15,000 \\ \text { (C) } 10,000 & \text { (D) } 18,000\end{array} \)

a) \( 2.981+32.9-12.76 \) b) \( 12.19-2.756+232.09 \) c) \( 92.001-62.65-2.76 \) d) \( 102.606-62.8-22.06 \)

5 रानू ने बाजार से 6 मीटर लंबी रिबन खरीदी। इसे वह 4 सहेलियों में बराबर बाँटती तो बताओ हर एक को कितने मीटर लंबी रिबन मिलेगी?