Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 968 · 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.🧩 Nisha is 9 years old. Vihaan is older than Nisha. How old is Vihaan? (a) not enough info (b) 10 (c) 11 (d) 14
2. 2.🧩 Vihaan is 10 years old. Aarav is 4 years older than Vihaan. How old is Aarav? (a) not enough info (b) 4 (c) 15 (d) 14
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
5. 5.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
6. 6.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
7. 7.🧩 Nisha bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹55 (c) ₹50 (d) ₹200
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
10. 10.🧩 Meera is 9 years old. Rohan is 7 years older than Meera. How old is Rohan? (a) 16 (b) not enough info (c) 7 (d) 17
11. 11.🧩 Rohan is 8 years old. Diya is older than Rohan. How old is Diya? (a) 9 (b) 13 (c) 10 (d) not enough info
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
15. 15.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Ishaan bought 6 balls and a bag for ₹380 in all. Each ball cost the same. What did one ball cost? (a) ₹374 (b) ₹63 (c) ₹380 (d) not enough info
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) 2 PM (d) not enough info
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
20. 20.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
21. 21.🧩 Saanvi is 11 years old. Arjun is older than Saanvi. How old is Arjun? (a) 12 (b) 13 (c) not enough info (d) 16
22. 22.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Diya bought 4 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹180 (d) ₹50
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
29. 29.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 2 PM
30. 30.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 4 PM (d) 7 PM
31. 31.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
32. 32.🧩 Meera is 12 years old. Ishaan is 2 years older than Meera. How old is Ishaan? (a) 14 (b) not enough info (c) 2 (d) 15
33. 33.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) not enough info (c) 10 (d) 50
34. 34.🧩 Meera is 12 years old. Ananya is older than Meera. How old is Ananya? (a) 17 (b) 13 (c) not enough info (d) 14
35. 35.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
37. 37.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
38. 38.🧩 Ananya is 11 years old. Arjun is 9 years older than Ananya. How old is Arjun? (a) 9 (b) not enough info (c) 21 (d) 20
39. 39.🧩 Rohan bought 4 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) not enough info (c) ₹60 (d) ₹15
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True

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