What is a prime number?

Найди сумму первых одиннадцати членов арифметической прогрессии \( \left(\mathrm{a}_{\mathrm{n}}\right) \), если \( \mathrm{a}_{1}=22, \mathrm{~d}=-10 \). Запиши число в поле ответа. \( \mathrm{S}_{11}=\square \)

The list price of a frock is ₹220. A discount of 20\% is announced on sales. What is the amount of discount on it and its sale price.

In article was purchased for ₹1239 including GST of 18\%. Find the price of the article before IST was added?

A class of 25 students is making necklaces. The necklaces each have 30 beads. How many beads are needed for each student to make one necklace?

1. Write the place value of 3 in 359. 2. Give one like fraction of \( \frac{2}{3}, \frac{9}{3} \) 3. The SI unit of length is 4. How many years are there in a century? 5. Full form of CCE is