Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 667 · 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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Arjun bought 2 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) ₹80 (c) not enough info (d) ₹40
3. 3.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
7. 7.🧩 Aarav bought 5 balls for ₹250 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹55 (c) ₹250 (d) ₹50
8. 8.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
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
10. 10.🥭 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
11. 11.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
12. 12.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
13. 13.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
14. 14.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
15. 15.🧩 Diya bought 2 markers and a water bottle for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹60 (c) not enough info (d) ₹58
16. 16.🧩 Arjun is 8 years old. Vihaan is older than Arjun. How old is Vihaan? (a) not enough info (b) 10 (c) 13 (d) 9
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Diya is 10 years old. Aarav is 8 years older than Diya. How old is Aarav? (a) not enough info (b) 18 (c) 19 (d) 8
23. 23.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 4 PM
24. 24.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) not enough info (c) 18 (d) 9
25. 25.🧩 Meera is 6 years old. Kabir is 3 years older than Meera. How old is Kabir? (a) 9 (b) not enough info (c) 3 (d) 10
26. 26.🧩 Nisha is 7 years old. Ishaan is older than Nisha. How old is Ishaan? (a) not enough info (b) 9 (c) 8 (d) 12
27. 27.🧩 Ananya bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹80 (d) ₹20
28. 28.🧩 Tara is 12 years old. Rohan is older than Tara. How old is Rohan? (a) 17 (b) not enough info (c) 13 (d) 14
29. 29.🧩 Ishaan bought 2 markers for ₹110 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹110
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
32. 32.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) not enough info (b) 49 (c) 14 (d) 56
33. 33.🧩 Ishaan bought 4 notebooks and a lunch box for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹170 (b) not enough info (c) ₹42 (d) ₹166
34. 34.🧩 Diya bought 2 pens and a bag for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹48 (b) ₹50 (c) not enough info (d) ₹25
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
36. 36.🧩 Vihaan bought 3 mangoes and a water bottle for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹67 (b) ₹70 (c) not enough info (d) ₹23
37. 37.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
39. 39.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
40. 40.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence

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