Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 604 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Kabir bought 5 kites for ₹175 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) not enough info (c) ₹175 (d) ₹40
2. 2.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a loud opinion (d) a rumour
3. 3.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
5. 5.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 32 (d) 36
6. 6.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 5 PM
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Vihaan bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹20 (c) ₹25 (d) not enough info
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
12. 12.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
15. 15.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
16. 16.🧩 Kabir is 12 years old. Vihaan is older than Kabir. How old is Vihaan? (a) 14 (b) 17 (c) not enough info (d) 13
17. 17.🧩 Diya is 7 years old. Ananya is older than Diya. How old is Ananya? (a) not enough info (b) 9 (c) 8 (d) 12
18. 18.🧩 Diya is 9 years old. Ananya is 3 years older than Diya. How old is Ananya? (a) 3 (b) 13 (c) not enough info (d) 12
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Meera bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹20 (c) ₹80 (d) not enough info
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
24. 24.🧩 Aarav bought 4 pens and a water bottle for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹100 (c) ₹25 (d) ₹96
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Vihaan is 9 years old. Meera is older than Vihaan. How old is Meera? (a) 10 (b) 14 (c) 11 (d) not enough info
27. 27.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
28. 28.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 30 (b) not enough info (c) 35 (d) 11
29. 29.🧩 Aarav bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹150
30. 30.🧩 Diya is 8 years old. Rohan is older than Diya. How old is Rohan? (a) not enough info (b) 13 (c) 10 (d) 9
31. 31.🧩 Aarav bought 3 notebooks and a cap for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹225 (c) ₹222 (d) ₹75
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
33. 33.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 14 (c) 48 (d) 56
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
35. 35.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) 8 PM (d) not enough info
36. 36.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Diya bought 4 markers and a lunch box for ₹170 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹42 (c) ₹166 (d) ₹170
38. 38.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
39. 39.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
40. 40.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 6 PM (d) 7 PM

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