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###### Target

105

3

9

7

17

13

Use each of the numbers only once with any mathematical operations to make an expression equal to the target.

If you can't make the target exactly, how close can you get to it?

## A Mathematics Lesson Starter Of The Day

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Topics: Starter | Arithmetic | Mental Methods

• Mike Moon, Royds School Leeds
•
• I got 173 from 8 x 11 + 5 x 16 + 5
• Hardip Sahota, Ernesford Grange, Coventry
•
• I did 15 x 14 = 210 then subtract 3 = 207
• The Best Class Ever (8cd/m2), King Alfred's College OXON
•
• This starter was a nice one to start with for our class. We had two attempts at this one, because somebody shouted out the first answer within 2 seconds(James!!!!!!!!!)
The sums we had were 49 (which was easy) and 262 (which took longer to do).
It was a good starter.
• Chloe Tovell,
•
• I got 226 (one out) by
8x7=56 then
16+18x5=170 finally
56+170=226.
i really liked this starter of the day and would like to see more like this!
• Ember, Huddersfield
•
• I had 1008. Numnbers were 1 4 1 18 14. Gives good practice on estimation.20 x 10 x 4 is 1000 take it from there. Finally got there with 18 x 14 x 4 + 1 - 1. It was the last bit that was perplexing. 'Can you do that? questions.
• 9-5 King's Grove, Crewe
•
• We found this easier to work backwards. We took the 2 away to work with 390 and when from there. 17+8 = 25 +1 = 26 x 15 = 390 +2 = 392.
• Jericho And Suheera, East Sheen Primary
•
• Answer for 336
16x18=288
3x8 = 24
24 x 2 = 48
288 + 48 = 336.
• STEVE EASTOP, MARGATE, KENT.
•
• TARGET: 1573
NUMBER SELECTION: 2,4,7,13,13
SOLUTION:
(13-2) X (7+4) X (13) = 11 X 11 X 13 = 1573!
I happened to notice at the start that the target figure was indeed divisible by 13 (121 times). It was easy then to get the two 11s needed from the remaining four numbers to multiply by one another to get the 121 necessary to then multiply the other 13 in the five numbers by to get the target!
• Transum,
•
• Happy Birthday Countdown! This activity is based on a television programme popular in the UK. Sixty nine series have been broadcast since its debut on 2nd November 1982. With over 5,000 episodes, Countdown is one of the longest-running game shows in the world, along with the original French version, Des chiffres et des lettres, which has been running on French television continuously since 1965. [Source Wikipedia].
• Miss Pocula, All Saints Academy Plymouth
•
• Target 1890 with 1, 7, 8, 10 & 14
(14+7) x (8+9) x 10
From Harry Shock 9A1.
• Jackie, Leicestershire
•
• I got the number 52224 with a lot of trial and improvement. the numbers were 4 8 8 17 and 12. I did 4 times 8 times 8 times 17 times 12 and it worked, this starter was amazing but tricky.
• East End Primary, Twitter
•
• Williamston Primary, Twitter
•
• Mattocks Primary School, Primary 7
•
• 14 x 19 = 266
3 x 7 = 21
add them together = 287
Then x 287 by 1 = 287.

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This starter has scored a mean of 3.2 out of 5 based on 684 votes.

Previous Day | This starter is for 2 November | Next Day

3 x 17 + 9(13 - 7) = 105

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## Texas Instruments Nspire Calculator

This handheld device and companion software are designed to generate opportunities for classroom exploration and to promote greater understanding of core concepts in the mathematics and science classroom. TI-Nspire technology has been developed through sound classroom research which shows that "linked multiple representation are crucial in development of conceptual understanding and it is feasible only through use of a technology such as TI-Nspire, which provides simultaneous, dynamically linked representations of graphs, equations, data, and verbal explanations, such that a change in one representation is immediately reflected in the others.

For the young people in your life it is a great investment. Bought as a gift for a special occasion but useful for many years to come as the young person turns into an A-level candidate then works their way through university. more...

## Apple iPad Pro

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The redesigned Retina display is as stunning to look at as it is to touch. It all comes with iOS, the world's most advanced mobile operating system. iPad Pro. Everything you want modern computing to be. more...

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 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Here a concise URL for a version of this page without the comments.

Transum.org/go/?Start=November2

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=Expression

Also available is the previous, Flash Version of this activity.

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