- Send the box with the lock to Alex.

- Alex can't open it, but can put another lock on the box.

- Alex sends this box with the 2 locks back to you, you unlock your lock and send it back to Alex again.

- So there is just Alex's lock on the box and Alex can now open it.

A) Bill | B) John |

C) Todd | D) None |

Explanation:

Bill.

From the detectives code **0415 7140 7718**

Each 4 digits may represent one name

Here 7718 mirror image represent BILL.

A) 15 | B) 17 |

C) 10 | D) 6 |

Explanation:

Sum of numbers in the outer circle in before Arc should come in inner circle patterns in the clock wise direction next Arc.

i.e, 9+6 = 15 comes in next arc of inner circle

7+3 = 10 comes in next arc of inner circle

In the same way, 4+2 = 6 comes in place of '?'.

A) 27 | B) 36 |

C) 24 | D) 32 |

Explanation:

From the given conditions ,

only A = 27 yrs satisfies.

A) 16 | B) 18 |

C) 20 | D) 24 |

Explanation:

From first figure : each fig has the value of 20 => It has inside 4 figures => Each individual figure has the value of '5'

From second => Each Triangle has the value of '1' (bcoz it contains two in each)

From third => Figure star has the value of '4'

Then in fourth => 4 + 1 + 15 = 20

A) 5 | B) 10 |

C) 15 | D) 12 |

Explanation:

In the first figure, number of triangles are 5.

In the second, the figure becomes double then the number of triangles also doubles.

i.e, 10.