5 for friday

Got a sum that's proving too hard for your grey matter? Ask the Stephen Hawkings of the Bunker and winner of the Fields Medal, I give you Mr Querty.

5 for friday

Postby qwerty keyboard » Fri Feb 08, 2013 10:57 am

Answer these questions without using a calculator:

1. 349 x 25 =

2. 714 ÷ 34 =

3. There are 365 days in a year, and each day has 24 hours in it. How many hours are there in a year?

4. After a school trip, there's £532 left over. The school decides to share this out between the 38 students on the trip. How much does each student receive?

5. A cardboard box weighs 247 grams. It contains 48 smaller boxes, each weighing 127 grams. What's the total weight of the large box and its contents?
If you're not depressed you're not paying attention
User avatar
qwerty keyboard
 
Posts: 1306
Joined: Wed Sep 19, 2012 4:17 pm
Location: St. Moritz

Re: 5 for friday

Postby Mr Ripper » Fri Feb 08, 2013 11:34 am

1.
349 x 10 = 3490
3490 x 2 = 6980
3490 / 2 = 1745
6980 + 1745 = 8725
Answer = 8725

2.
34 x 10 = 340
340 x 2 = 680
680 + 34 = 714
Answer = 21

3.
365 x 10 = 3650
3650 x 2 = 7300
365 x 4 = 1460
7300 + 1460 = 8760
Answer = 8760

4.
38 x 10 = 380
532 - 380 = 152
152 / 38 = 4
10 + 4 = 14
Answer = 14

5.
127 x 10 = 1270
1270 x 5 = 6350
127 x 2 = 254
6350 - 254 = 6096
6096 + 247 = 6343
Answer = 6343
Deep down inside you know I'm always right

NOTE: Any statements made by me are, for the avoidance of doubt and arseyness, my opinion and not necessarily absolute fact nor are they necessarily shared by the people who own and run this board
User avatar
Mr Ripper
 
Posts: 18484
Joined: Fri Aug 18, 2006 7:20 am
Location: Up Jack's Arse in America

Re: 5 for friday

Postby Warwick Hunt » Fri Feb 08, 2013 1:09 pm

Where's Rachel Riley when you need her?
User avatar
Warwick Hunt
 
Posts: 3561
Joined: Tue Oct 16, 2007 7:40 pm
Location: Still trying to find myself

Re: 5 for friday

Postby qwerty keyboard » Fri Feb 08, 2013 2:15 pm

Mr Ripper wrote:1.
349 x 10 = 3490
3490 x 2 = 6980
3490 / 2 = 1745
6980 + 1745 = 8725
Answer = 8725

2.
34 x 10 = 340
340 x 2 = 680
680 + 34 = 714
Answer = 21

3.
365 x 10 = 3650
3650 x 2 = 7300
365 x 4 = 1460
7300 + 1460 = 8760
Answer = 8760

4.
38 x 10 = 380
532 - 380 = 152
152 / 38 = 4
10 + 4 = 14
Answer = 14

5.
127 x 10 = 1270
1270 x 5 = 6350
127 x 2 = 254
6350 - 254 = 6096
6096 + 247 = 6343
Answer = 6343


All correct 50 points to Slytherin :cool:
If you're not depressed you're not paying attention
User avatar
qwerty keyboard
 
Posts: 1306
Joined: Wed Sep 19, 2012 4:17 pm
Location: St. Moritz


Return to Querty's Difficult Sums forum

Gadgies online

Dodgepots browsing this forum: No registered users and 148 guests

cron