Others Maths Puzzle

Fill in the next number in the series.
81,64,49,36,25.......?
A. 16
B. 20
C. 35
D. 18

Read Solution (Total 1)

Others Other Question
Two pipes a and b fill a cistern in 15 and 10 hours respectively . Tap c can empty the full cistern in 30 hours . All the three taps were open for 2 hours , when it was remembered that the emptying had left been open, it was then closed . How many hours more would it take for the cistern to be filled? Can somebody explain it in shortcut Whoever posting obscene posts, their profile are hacked. They even are not aware of those posts. Fundamental security tips to secure profile from being hacked: 1. In mozilla firefox, use private browsing. This option is available at the top menu bars. For google chrome, use incognito window. Right click at the top status bar, then select it. 2. Don't select 'remember my password'. 3. Don't choose to 'stay signed in'. 4. If u don't apply point 1, then just clear your history frequently or install c-cleaner. 5. Never click on advirtisement. 6. Don't left-click on download link, it's always safe to right-click on link and then choose 'save target as'. 7. Frequently change your password and use strong one.