Put your intelligence to the test - just how clever do you think you are?

Do you think you have an impressive IQ score? It's time to find out.

No need for books or tests, this simple quiz will give you an accurate gauge of just how brainy you really are.

Although it's supposed to be quick, there's far more to these questions than meets the eye, so tingle those brainwaves with these teasers.

These teasers are part of what's called The Cognitive Reflection Test, according to the Mirror .

The CRT consists of just three questions and evaluates how accurately you can answer a question which is in fact harder than it first appears.

The quicker you do this, the more intelligent you appear to be.

So have a go and see how you fare - good luck!

### Question 1.

A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?

### How much does the ball cost?

The odds are you answered 10p for this question - we certainly did at first. This, however, is the WRONG answer.

If the ball costs X, and the bat costs £1 more, then it can be worked out like this:

X+£1

Therefore

Bat+ball=X + (X+1) =1.1

Thus

2X+1=1.1, and 2X=0.1

X= 0.05

### Question 2.

If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets?

### How long would it take the machines to make 100 widgets?

It's tempting, if answering these quickly, to guess 100 minutes.

But this isn't the right answer.

Instead, if five machines can make five widgets in five minutes then one machine will make one widget in five minutes too.

Therefore if we have 100 machines all making widgets, they can make 100 widgets in five minutes.

### Question 3.

In a lake, there is a patch of lily pads. Every day, the patch doubles in size.

If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

### How long does it take for the patch to cover half of the lake?

While many people might have answered 24 days, the answer goes as follows.

If the patch doubles in size each day going forward, it would halve in size going backwards. So on day 47, the lake is half full.

Of course, given the absence of verbal reasoning or any real variety of question, it's not the most accurate test.

So don't feel too bad if, like us, you did not get a single one right.

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